// fstbin/fstaddselfloops.cc
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// Copyright 2009-2011 Microsoft Corporation
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// See ../../COPYING for clarification regarding multiple authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
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// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
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// MERCHANTABLITY OR NON-INFRINGEMENT.
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// See the Apache 2 License for the specific language governing permissions and
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// limitations under the License.
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#include "base/kaldi-common.h"
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#include "fst/fstlib.h"
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#include "fstext/determinize-star.h"
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#include "fstext/fstext-utils.h"
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#include "fstext/kaldi-fst-io.h"
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#include "util/parse-options.h"
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#include "util/simple-io-funcs.h"
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/* some test examples:
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pushd ~/tmpdir
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( echo 3; echo 4) > in.list
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( echo 5; echo 6) > out.list
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( echo "0 0 0 0"; echo "0 0" ) | fstcompile | fstaddselfloops in.list out.list | fstprint
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( echo "0 1 0 1"; echo " 0 2 1 0"; echo "1 0"; echo "2 0"; ) | fstcompile | fstaddselfloops in.list out.list | fstprint
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*/
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int main(int argc, char *argv[]) {
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try {
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using namespace kaldi;
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using namespace fst;
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using kaldi::int32;
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const char *usage =
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"Adds self-loops to states of an FST to propagate disambiguation symbols through it\n"
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"They are added on each final state and each state with non-epsilon output symbols\n"
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"on at least one arc out of the state. Useful in conjunction with predeterminize\n"
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"\n"
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"Usage: fstaddselfloops in-disambig-list out-disambig-list [in.fst [out.fst] ]\n"
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"E.g: fstaddselfloops in.list out.list < in.fst > withloops.fst\n"
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"in.list and out.list are lists of integers, one per line, of the\n"
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"same length.\n";
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ParseOptions po(usage);
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po.Read(argc, argv);
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if (po.NumArgs() < 2 || po.NumArgs() > 4) {
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po.PrintUsage();
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exit(1);
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}
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std::string disambig_in_rxfilename = po.GetArg(1),
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disambig_out_rxfilename = po.GetArg(2),
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fst_in_filename = po.GetOptArg(3),
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fst_out_filename = po.GetOptArg(4);
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VectorFst<StdArc> *fst = ReadFstKaldi(fst_in_filename);
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std::vector<int32> disambig_in;
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if (!ReadIntegerVectorSimple(disambig_in_rxfilename, &disambig_in))
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KALDI_ERR << "fstaddselfloops: Could not read disambiguation symbols from "
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<< kaldi::PrintableRxfilename(disambig_in_rxfilename);
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std::vector<int32> disambig_out;
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if (!ReadIntegerVectorSimple(disambig_out_rxfilename, &disambig_out))
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KALDI_ERR << "fstaddselfloops: Could not read disambiguation symbols from "
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<< kaldi::PrintableRxfilename(disambig_out_rxfilename);
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if (disambig_in.size() != disambig_out.size())
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KALDI_ERR << "fstaddselfloops: mismatch in size of disambiguation symbols";
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AddSelfLoops(fst, disambig_in, disambig_out);
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WriteFstKaldi(*fst, fst_out_filename);
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delete fst;
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return 0;
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} catch(const std::exception &e) {
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std::cerr << e.what();
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return -1;
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}
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return 0;
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}
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